To protect against irritations regarding the correct connection of the gearbox to our electronics, here is a description about.
The indicated cable colors may differ from the print on the gearbox!
On some locomotives the gearboxes are installed 180 ° rotated.
With Piko are completely different colors and assignments.
Digital, the polarity on the track has an effect, but this can be changed by CV. So if you always want to go analog in the right direction should heed the above pin assignment.